Ren'Py Examples: Logic and randomization

Page created: 2025-05-05

The Ren’Py mascot Eileen but she is holding a yellow rat rather than a yellow pyton

Randomize your things!

Ren’Py makes methods of the Python random module available through renpy.random.

To generate a random number, use randint(start, end):

# Generate a number between 0 and 100
$ mynum = renpy.random.randint(0,100)

e "I'm thinking of the number [mynum]."

To pick an item from a list, use choice():

# Make a list
$ toppings = ['cheese', 'more cheese'];

# Pick from the list
$ my_topping = renpy.random.choice(toppings)

# Or do it all in one line
$ my_bread = renpy.random.choice(['rye', 'wheat', 'sourdough'])

# Print out the chosen items
e "You have chosen [my_topping] on [my_bread]"

Random yes/no choices can also be made with the choice() function if we provide it a list containing the boolean values True and False:

# Shall we throw the customer's sandwich?

# Pick True or False
if renpy.random.choice([True,False]):
    e "I have thrown your sandwich outside!"
else:
    e "Here is your sandwich. Enjoy."